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CVE-2025-11468
Folding email comments of unfoldable characters doesn't preserve parenthesis
Medium5.7EPSS 0.62%
- Published
- Updated
- Reserved
- Assigned by
- PSF
Description
When folding a long comment in an email header containing exclusively unfoldable characters, the parenthesis would not be preserved. This could be used for injecting headers into email messages where addresses are user-controlled and not sanitized.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| PSFCNA (assigner) | 4.0 | Medium5.7 | CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N |
| NVDNVD · Deferred | 4.0 | Medium5.7 | CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
- EPSS (exploitation in 30 days)
- 0.62% · top 50% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.7.
Weakness
Affected products
Python Software Foundation · CPython
- affected < 3.10.20
- affected 3.11.0 – < 3.11.15
- affected 3.12.0 – < 3.12.13
- affected 3.13.0 – < 3.13.12
- affected 3.14.0 – < 3.14.3
- affected 3.15.0a1 – < 3.15.0a6
References (9)
- https://github.com/python/cpython/pull/143936 (opens in a new tab)patch
- https://github.com/python/cpython/issues/143935 (opens in a new tab)issue-tracking
- https://mail.python.org/archives/list/[email protected]/thread/FELSEOLBI2QR6YLG6Q7VYF7FWSGQTKLI/ (opens in a new tab)vendor-advisory
- https://github.com/python/cpython/commit/17d1490aa97bd6b98a42b1a9b324ead84e7fd8a2 (opens in a new tab)patch
- https://github.com/python/cpython/commit/61614a5e5056e4f61ced65008d4576f3df34acb6 (opens in a new tab)patch
- https://github.com/python/cpython/commit/e9970f077240c7c670e8a6fc6662f2b30d3b6ad0 (opens in a new tab)patch
- https://github.com/python/cpython/commit/f738386838021c762efea6c9802c82de65e87796 (opens in a new tab)patch
- https://github.com/python/cpython/commit/a76e4cd62dd68e7cbe86e37e6ed988495a646b66 (opens in a new tab)patch
- https://github.com/python/cpython/commit/003b8315669b9f08b1010a49071f73f15f818094 (opens in a new tab)patch
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2025-11468)Record last updated .